Merge branch '2.1.x'

Closes gh-17793

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/condition/OnBeanCondition.java

@@ -156,7 +156,8 @@ class OnBeanCondition extends FilteringSpringBootCondition implements Configurat
 		Set<Class<?>> parameterizedContainers = spec.getParameterizedContainers();
 		if (spec.getStrategy() == SearchStrategy.ANCESTORS) {
 			BeanFactory parent = beanFactory.getParentBeanFactory();
-			Assert.isInstanceOf(ConfigurableListableBeanFactory.class, parent, "Unable to use SearchStrategy.PARENTS");
+			Assert.isInstanceOf(ConfigurableListableBeanFactory.class, parent,
+					"Unable to use SearchStrategy.ANCESTORS");
 			beanFactory = (ConfigurableListableBeanFactory) parent;
 		}
 		MatchResult result = new MatchResult();